Valve-grinder



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VALVE GRINDER. APPLICATION r1 R 2 INVENTOR ATTORNEYS Patented May 25, 1920. i

UNITED srA'ras PATENT OFFICE.

HARRY A. WEIGHT, 013 SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE AMERICAN HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

VALVE-GRINDER.

Specification of Letters Patent.

Patented May 25, 1920.

Application filed March 20, 1919. Serial No. 283,845.

Hampden and State of Massachusetts, have;

invented certain new and useful Improvements in Valve-Grinders, of which the fol lowing is a specification.

This invention relates to improvements in valve grinders and more particularly to a valve grinding apparatus, which is adapted to be secured to the cylinder block of an engine and to simultaneously effect the grinding of a plurality of valves.

According to one feature of this invention, the valve-oscillating elements are mounted in a frame which has legs at its ends to support it from the cylinder block in overlying relation with the valves, and this frame is pivotally connected to a bar, which is adapted for attachment 'to the cylinder block by the same means which hold the cylinder head thereto.

According to another feature of the in vention, the valve-oscillating elements are arranged for simultaneous oscillation by means including a manually operable lever, which lever is movable in a plane parallel with said frame, and so disposed as to afford, not only a convenient means for oscillating the valves, but also a convenient means for raising or lowering the frame on its pivot.

Other features and advantages for the invention will appear in the following description and in the illustrative embodiment of the invention in the accompanying drawin s, in which-- *igure 1 is a top plan view showing-e valve grinder, embodying theinventlon, in place on the cylinder block of an engine;

Fig. 2 is a fragmentary side elevatlonal view, partly in section, of the grinder and cylinder block;

Fig. 3 is an end elevational view thereof taken from the right hand end of Fig. 1;

Fig. A is an enlarged fragmentary cross sectional view illustrative of a detail of the valve grinder;

Fig. 5 is a perspective view of one of the valve oscillating parts of the grinder; and

Fig. 6 is a top plan view of a valve showing means thereon for cooperation with the part shown in Fig. 5.

Referring to these drawings; the valve the bar 12 is held to block A by nuts grinder includes a movable frame and a part on which the frame is mounted for movement, such part being adapted to be removably secured in a convenient manner to the top of the cylinder block of an engine. As shown, the movable frameconsists of a longitudinal bar 10 and legs 11 depending at right angles to such bar and arranged one at each end of the latter. The stationary part consists of a bar 12 which parallels the bar 10 and is pivotally secured as by pins 13, to the rearward lower ends 0 the legs 11.

To illustrate the application of the valve grinder, a cylinder block of an engine is conventionally shown at A. As shown, block A has four cylinders c therein and the eight valves for these cylinders are arranged in a single row at one side of the cylinders. The studs, by means of which the cylinder head is secured to the block A, are shown at s. The bar 12 is provided with openings to receive certain of these studs,

or their equivalent as the cap screws'which are sometimes used, and these holesare so arranged that the bar 10 is disposed parallel with and directly above the row of valves e. When studs are used, as shown,

n which however would not be necessary if cap screws are used, as is sometimes the case. The legs 11 are preferably so pivoted to bar 12'that their lower ends 14. abut the top face of block A and hold bar 10 in parallelism therewith.

Loosely mounted in bar 10 are a series of vertical stems 15, one for each valve '22 and in axial alinement therewith. On the lower end of eachstem 15 is a block 16, which as shown in Fig. 5, has in its lower face a pair of spaced pins 17 to engage in a correspondingly spaced pair of holes h in the upper face of valve 0. Thus each valve 4) may be turned on its axis by a turning of the stem 15 thereabove. Obviously, other interengaging means may, if desired, be provided on block 16 and valve '0 to accomplish this function.

Fixed on the upper end of each stem 15 is a gear 18 and the several gears mesh with a rack 19 which is slidable longitudinally on the bar 10. As shown in Fig. a, bar 10 has an upstanding flange 20, against which the rear face of the rack abuts to hold it in proper meshing relation with the gears 18.

nected to rack 19 by a link 25. The lever 22 thus swings in a horizontal plane parallel with the plane in which rack 19 is reciprocable and at right angles to the axes of the I "valve oscillating elements. The rack 19 is a narrow member and the securing bar 12 lies approximately beneath it when the axes of the"valveoscillatmg spindles are in vertical position. The peripheries of the gears 18 also extend approximately to the vertical plane passing through the bar 12 so that the deviceiscompactand legs 11 are easily held against the cylinder block by a slight downward pressure upon the lever 22, thus making it unnecessary to lock the carrier in position.

A guide 26 is supported from bar 10 in parallelism therewith by integral depending parts 27, which, limit the extent of -movement of the lever and thus the extent of movement of rack 19. The movement of rack 19 is, how ver, suflicient to turn gears 18' through at least one full revolution. The

guide 26 overlies lever 22 adjacent its connection with link 25 and lies substantially contiguous with the upper face of lever 22.

Consequently, the latter, aside from its function in rotating the stems 15, is'adapted for use in raising or lowering bar 10 on its pivots 13. Vvhilethelever 22 could be used for this purpose without the guide 26,

nevertheless, such use of the lever would place undesired strains on the pivot 23 or the. pivots of link 25. With the guide, such strains, and the binding action incident thereto, are avoided.

Tn-order to force the blocks 16' toward the valves and to secure pressure-on the latter during their oscillation or rotation, as the case may be, a spring 28 is coiled about each stem 15 and acts between the under face of bar 10 and head 72 (or by preference a washer 29 which is placed'on stem 15 and abuts head h) and acts against theunder face of the bar to force the stems down- 'wardly. The underfaces of gears 18, of course, limit this downward movement of the stems but the latter are of such length that when the bar 10 is positioned, as in Figs. 2. and 3, the gears are lifted sufficiently from the bar to permit the springs 15 to freely act in the performance of their intended functions.

In operation, the bar 12 is secured to the cylinder block as described and the opera tor, performs the other usual preliminary operations necessary to valve grinding, such "as the placing of springs is about the stems e of valves 02 to. lift theilatter from their seats when pressure is relieved. Grinding conipound is applied 1n the usual way ,to the valves and then the operator-swings frame 10, by means of lever 22 intoltheillustrated ing ofbar 10. If the valves are to be shifted to a newangular position, this may be accomplished byswinging lever 22 while bar 10 is lifted,"so'that when 'the'latter -isde pressed the valves will seat in a new-position.

An important feature of the invention consists in the arrangement, whereby the "one lever serves conveniently as a means for oscillating the valves=and for moving them, or permitting them'to be moved, to and from their seats during the grinding opera- -tion. Thus, all the operator has to do is to swing'the lever baclrand forth in one'plane and from time to time swing it in another plane to move bar 10'on its pivots. Moreover, should the weight of bar 10 not be "sufiicient to hold it in the illustrated p'osition, a slight downward pressure on "the lever 22, which, with the particular di'sposb tion of the lever, is 'more or less natural anyway, will. holdthe bar in the desired "position.

The invention has been disclosed herein, in an embodiment, at present preferred, for illustrative purposes but the 'scope'of the "inventionis defined by the appendedclaims rather than by the foregoing description.

What I claim is 1. A valve grinder, comprising amember "having means to support it from a cylinder block and in overlying relation to the valves thereof, a second member adapted 'tolbe'secured to said block and'to whichthe first member is pivotally connected,'soas to rotate "about 'a horizontal axis, a pluralityof valveoscillating-elements mounted in Saidfirst member, and meansforoscillating said elements, said means including a manually operable lever pivoted to the first member 'to swing in a plane at right anglesto-theiaxes of said valve-oscillating elements and adapted for use in moving the first member relatively to the "second member.

'2. A'valve grinder comprising abar 'having two longitudinally spaced legs tosupport it from and in spaced relationwvith the top face of a cylinder block, andadapted to directly' engage said block, a secon'dkbar to which said first'b'ar is-pivoted' so as to rotate about a horizontal axis and -wh-ich-is.z=provided with means for attachment 'to *the cylinder block, so that the first bar is positioned parallel and in overlying relation with the valves, a plurality of valve-oscillating elements rotatably mounted in the first bar, and a lever mounted on the latter to simultaneously oscillate said elements, said lever moving in a plane at right angles to the axes of said valve-oscillating elements.

A valve grinder comprising a member adapted to be supported in overlying relation with the valves of a cylinder block, a second member adapted to be secured to said block and having pivotal connections with said first member, so that said first member is rotatable about a horizontal axis, a plurality of valve-oscillating elements mounted in said first member and each provided with a toothed wheel at its upper end, means comprising a horizontal lever for oscillating said wheels, and means for securing said 7 second member to said block and located approximately in line with said pivotal connections' and the vertical plane passing through the peripheries of said toothed wheels when their axes are in vertical position.

4:. A valve grinder comprising a member adapted to be supported in overlying relation to the valves of a cylinder block, a second member adapted to be secured to said block and to which said first member is pivotally connected, so as to rotate about a horizontal axis, a plurality of valve-oscillating elements provided with gears located above said first member, a lever secured tcn said first member and movable in a plane at right angles to the axes of said gears, and a narrow rack engaging said gears and connected to said lever for oscillating said valve-oscillating elements, the pivotal con nections with said second member being locatedsubstantially beneath said rack when the axes of said valve-oscillating members are in vertical position. v

5. A valve grinder comprising a supporting member adapted to be supported in definite relation to a cylinder block, a securing bar pivoted to said member so that said member is rotatable about a horizontal axis and provided with means for securing it to said cylinder block, a rack with vertical teeth sliding upon said supporting member, a plurality ofvalve-oscillating spindles rotatively mounted in said supporting member and movable both longitudinally and axially relatively thereto, a gear upon the upper end of each of said spindles and adapted to bear on said supporting member, a spring on each of said spindles below said supporting member and engaging said member and its spindle so as to tend to hold said gear in engagement with said supporting member, each of said spindles being movable against the action of its spring so as to disengage its gear from said rack, and a lever fulcrumed upon said supporting member and moving in a plane at right angles to the axes of said spindles.

HARRY A. 

